21, N O R F O L K. isi 



beds of marl In a^mofl: every eftate, and, ia 

 fome places, on almofl every farm, fituated 

 fufficlently near tlxe furfacc to he worked 

 with advantage. 



Of the quality of mar%s, a« has hctn already 

 cbfervcd, the Norfolk farmers are, in a great 

 meafiMre, uninformed. That which falls moft 

 •readily, and *' gets to work'* the fooneil, is 

 in the belt eiieem ; but, in general, the quan- 

 tity of " uncallow'* (namely, the coping, or 

 covering of earth, which lies upon the head, 

 -or jam) is more attended to ths.a the intdnfie 

 i]uality of the marl. 



The deplb of uncalloffj is generally very un- 

 equal : perhaps, <jn the fame jam of marl it 

 will vary from one or two, to fix or eight, feet 

 deep, the furface of the jam ufually ri(ing inta 

 inequalities, termed heads. 



The depth of the jam is equally uncertain : I 

 have feen one worked twenty feet deep ; but 

 in general, I believe, ten or twelve feet may 

 be reckoned a middling depth. 



The bottom of the jam, being generally a 



white abforbent fund, no pump or artificial 



drain is requifite to free a Norfolk marl-pit 



trpni water, which no fooner touches the fand 



L 4 than 



